CN101717143B - Method for controlling automatic flocculant addition - Google Patents
Method for controlling automatic flocculant addition Download PDFInfo
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- CN101717143B CN101717143B CN2009102343414A CN200910234341A CN101717143B CN 101717143 B CN101717143 B CN 101717143B CN 2009102343414 A CN2009102343414 A CN 2009102343414A CN 200910234341 A CN200910234341 A CN 200910234341A CN 101717143 B CN101717143 B CN 101717143B
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Abstract
The invention discloses a method for controlling automatic flocculant addition, which belongs to the field of sewage treatment. A feedback control system determines the flow of sewage and the concentration of TP and SS after sewage treatment and feeds back determination results to a PLC control system; and the PLC control system performs calculation by using undetermined parameters through a formula as follows: delta X dosage=k*Q*L*(P-1.1A)a*(S-1.05B)b/(lambda*N)according to the feedback of the feedback control system of the flow, the TP and the SS to indirectly determine the dosage of flocculant. The invention can regulate the dosage of the flocculant in time according to the coagulation effect of the sewage treatment and ensure the optimal dosage of the flocculant and the effect of the sewage treatment.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, especially for the Automatic Dosing control method of micro flocculating filter or coagulating sedimentation filtration.
Background technology
At present, the whole world all is faced with the problem of shortage of water resources, and as limited resources, the regeneration of water is that advanced treatment of wastewater becomes unique approach of dealing with problems.
Research and development are economical, sewerage advanced treatment process improves water environment for subduing the total amount of pollutant efficiently, build good water environment and improve people's quality of life, have urgent realistic meaning.Advanced treating generally adopts micro flocculating filter or coagulating sedimentation filtering technique etc.; Further remove the major pollutants of secondary effluent; And the flocculating agent that adds is the main operating cost of micro flocculating filter or coagulating sedimentation filtering technique, and existing dosing system is just confirmed the dosage of flocculating agent according to flow of inlet water and turbidity, filters except removing turbidity yet add flocculating agent; Also total phosphorus (TP) and solid suspension (SS) had good effect of removing; And TP and SS be in the Sewage Plant secondary effluent integrated wastewater discharge standard primary standard A standard can not be up to standard most important index, and very unstable, add the very few water outlet of flocculating agent like this and can not reach standard; Flocculant concentration is excessive not only can be wasted, and can produce a large amount of mud.Therefore setting up the automatic medicament feeding system that changes based on TP, SS and the water yield has important practical significance.
In addition, along with developing rapidly of society, sewage treatment plant popularizes gradually and uses the on-line monitoring appearance to replace manual work to detect the water outlet leading indicator, and the on-line monitoring appearance of the costliness of buying is not so considered to be used for other purposes just as just on-line monitoring system.
Summary of the invention
The object of the present invention is to provide in a kind of realization advanced treatment of wastewater processing procedure; The Automatic Dosing control device that the flocculating agent of micro flocculating filter or coagulating sedimentation filtering technique adds accurately automatically; And this device can make full use of sewage treatment plant's conventional online monitor, has so just deducted the prime cost of Automatic Dosing control device.
The present invention adopts following technical scheme for realizing the foregoing invention purpose:
A kind of method for controlling automatic flocculant addition, first step are the installations of automatic flocculant addition control system: said control system comprises feedback control system, PLC control system, volume pump, mixer and filtering ponds; Feedback control system by the flow instrument of measuring the discharge of sewage, be used for measuring the online TP monitor of the content of sewage total phosphorus, the online SS analyzer that is used for measuring the sewage solid suspension content is formed; Feedback control system is arranged at the sewage equipped at outlet port; Wherein the input end of flow instrument, online TP monitor, online SS analyzer is connected with the input end of sewage delivery outlet, mixer respectively; The output terminal of flow instrument, online TP monitor, online SS analyzer is connected with the input end of PLC control system respectively, and the output terminal of PLC control system connects volume pump, mixer, filtering ponds successively; It is characterized in that: automatic flocculant addition comprises the steps:
A, utilize flow instrument to measure the discharge of sewage;
B, utilize the content of total phosphorus in the online TP analysis-e/or determining sewage;
C, utilize online SS analyzer to measure solid suspension content in the sewage;
D, the value of A-C step measurements is sent in the PLC control system, the PLC control system calculates flocculant dosage according to the result who measures, and then this dosage is sent to volume pump, and volume pump outputs to flocculating agent in the mixer according to this dosage;
E, mixer are rendered to flocculating agent in the sewage, then mixed water are outputed to filtering ponds.
Wherein among the step D calculating of flocculant dosage according to formula Δ X
Medicament=k * Q * L * (P-1.1A)
a* (S-1.05B)
b/ (λ * N) confirm; In the formula,
K: correction factor, 0.5≤K≤1.5;
Q: the instantaneous delivery of actual flow of inlet water meter;
L: standard medicine consumption;
P: the content of total phosphorus in the sewage of online TP monitor monitoring;
S: the content of the solid suspension that online SS analyzer is measured;
A: the total phosphorus content standard in the water outlet;
B: the solid suspension content standard in the water outlet;
A: modified index, 0.8≤a≤1.0;
B: undetermined coefficient, 0≤b≤0.2;
λ: soup rate of specific gravity;
N: soup number percent.
Beneficial effect:
The described automatic flocculant addition control system of the application of the invention method can guarantee that the consumption of flocculating agent reaches optimum amount according to the timely addition of adjusting flocculating agent of water quality and quantity fluctuation of water outlet.Simultaneously, to the flow of sewage and the feedback of water quality, in time, guarantee the water treatment effect according to the flow that is provided with and feedback control system according to the addition of the water quality and quantity adjustment flocculating agent that comes water.Advantage of the present invention is:
1, set up the mathematical model that adds dose and flow of inlet water and TP and SS, confirmed that the best of the different quality water yield adds dose;
2, for the sewage treatment plant of online SS analyzer of effluent adopting and online TP analyser, need not to buy expensive online TP analyser and online SS analyzer once more, practiced thrift cost greatly;
3, whole medicine system adopts computer program control, has guaranteed the stability of device operation;
4, realized closed-loop control; Rely on dosing software design program to realize that any time adds the Optimal Control of dose, practiced thrift cost of water treatment greatly, guarantee to handle the back water stabilization; Reach under the situation of high-quality water quality in assurance, the consumption of flocculating agent reduces more than 20%;
5, automaticity is high, has alleviated working strength of workers, has reduced the waste of medicament; Having reduced the hesitation medicament adds inaccurate and risk that cause; Advance to have reduced the chance that the workman contacts medicament, improved production efficiency, help the personnel reduction and enlargement of sewage treatment plant's production station simultaneously;
6, both be applicable to newly-built water factory, also be fit to tapping the potential and upgrade technologically of old water factory, and need not change original process structure basically tapping the potential and upgrade technologically of old water factory;
7, it is little that effluent quality receives the interference of source water quality, the water yield, improved the stability of water outlet, prolonged the serviceable life of the backwashing period and the filtrate in filter tank, improved producing water ratio, remarkable in economical benefits.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention and embodiment thereof are done further explain.
The automatic flocculant addition control system comprises feedback control system, PLC control system, volume pump, mixer and filtering ponds; Feedback control system is arranged at the sewage equipped at outlet port; By the flow instrument of measuring the discharge of sewage, be used for measuring the online TP monitor of the content of sewage total phosphorus, the online SS analyzer that is used for measuring the sewage solid suspension content is formed; Wherein the input end of flow instrument, online TP monitor, online SS analyzer is connected with the input end of sewage delivery outlet, mixer respectively; The output terminal of flow instrument, online TP monitor, online SS analyzer is connected with the input end of PLC control system respectively, and the output terminal of PLC control system connects volume pump, mixer, filtering ponds successively.
Method for controlling automatic flocculant addition of the present invention comprises the steps,
A, utilize flow instrument to measure the discharge of sewage;
B, utilize the content of total phosphorus in the online TP analysis-e/or determining sewage;
C, utilize online SS analyzer to measure solid suspension content in the sewage;
D, the value of A-C step measurements is sent in the PCL control system, the PCL control system calculates flocculant dosage according to the result who measures, and then this dosage is sent to volume pump, and volume pump outputs to flocculating agent in the mixer according to this dosage;
E, mixer are rendered to flocculating agent in the sewage, then mixed water are outputed to filtering ponds.
Wherein among the step D flocculant dosage according to formula Δ X
Medicament=k * Q * L * (P-1.1A)
a* (S-1.05B)
b/ (λ * N) confirm; In the preceding formula,
K: correction factor, 0.5≤K≤1.5;
Q: the instantaneous delivery of actual flow of inlet water meter;
L: standard medicine consumption;
P: the content of total phosphorus in the sewage of online TP monitor monitoring;
S: the content of the solid suspension that online SS analyzer is measured;
A: the total phosphorus content standard in the water outlet;
B: the solid suspension content standard in the water outlet;
A: modified index, 0.8≤a≤1.0;
B: undetermined coefficient, 0≤b≤0.2;
λ: soup rate of specific gravity;
N: soup number percent.
With Jiangsu sewage treatment plant is example, and mark transformation is carried by this sewage treatment plant, uses little flocculation-sand filtration technology as advanced treatment process, makes water outlet bring up to one-level A by sewage drainage standard one-level B, adopts aluminium polychloride (PAC) as flocculating agent.In use, at first set the best and add dose Δ X
PAC, drawing k=1, L=7.18, a=0.995, b=0.058 through the long-term mass data in scene, flow of inlet water Q is approximately 4166.67m
3/ h, the TP concentration of one-level A standard is 0.5mg/L, SS concentration is 10mg/L, draws X at last
PACValue.
X
PAC＝1×Q×7.18×(P-0.5)
0.995×(S-10)
0.058/(1×10％)
Set a TP and SS initial value 1,20, desired value is sent to the automatic dosing system of flocculating agent, adjust flocculant addition by the PLC control system, and send appointment to volume pump, volume pump adds a certain amount of flocculating agent to mixer.Feedback control system is before wastewater treatment; The flow of mensuration sewage and TP, SS concentration; To measure the result and feed back to the PLC control system, the PLC control system is in time adjusted amount and joining day that flocculating agent adds according to the feedback of flow and TP and SS feedback control system.
Claims (1)
1. method for controlling automatic flocculant addition, first step is the installation of automatic flocculant addition control system: said control system comprises feedback control system, PLC control system, volume pump, mixer and filtering ponds; Feedback control system by the flow instrument of measuring the discharge of sewage, be used for measuring the online TP monitor of the content of sewage total phosphorus, the online SS analyzer that is used for measuring the sewage solid suspension content is formed; Feedback control system is arranged at the sewage equipped at outlet port; Wherein the input end of flow instrument, online TP monitor, online SS analyzer is connected with the input end of sewage delivery outlet, mixer respectively; The output terminal of flow instrument, online TP monitor, online SS analyzer is connected with the input end of PLC control system respectively, and the output terminal of PLC control system connects volume pump, mixer, filtering ponds successively; It is characterized in that: automatic flocculant addition comprises the steps:
A, utilize flow instrument to measure the discharge of sewage;
B, utilize online TP monitor to measure the content of total phosphorus in the sewage;
C, utilize online SS analyzer to measure solid suspension content in the sewage;
D, the value of A-C step measurements is sent in the PLC control system, the PLC control system calculates flocculant dosage according to the result who measures, and then this dosage is sent to volume pump, and volume pump outputs to flocculating agent in the mixer according to this dosage;
E, mixer are rendered to flocculating agent in the sewage, then mixed water are outputed to filtering ponds;
Wherein among the step D calculating of flocculant dosage according to formula:
Δ X
Medicament=k * Q * L * (P-1.1A)
a* (S-1.05B)
b/ (λ * N) confirm;
In the following formula,
K: correction factor, 0.5≤k≤1.5;
Q: the instantaneous delivery of actual flow of inlet water meter;
L: standard medicine consumption;
P: the content of total phosphorus in the sewage of online TP monitor monitoring;
S: the content of the solid suspension that online SS analyzer is measured;
A: the total phosphorus content standard in the water outlet;
B: the solid suspension content standard in the water outlet;
A: modified index, 0.8≤a≤1.0;
B: undetermined coefficient, 0≤b≤0.2;
λ: soup rate of specific gravity;
N: soup number percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102343414A CN101717143B (en) | 2009-11-24 | 2009-11-24 | Method for controlling automatic flocculant addition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102343414A CN101717143B (en) | 2009-11-24 | 2009-11-24 | Method for controlling automatic flocculant addition |
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| CN101717143A CN101717143A (en) | 2010-06-02 |
| CN101717143B true CN101717143B (en) | 2012-02-01 |
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| CN2009102343414A Expired - Fee Related CN101717143B (en) | 2009-11-24 | 2009-11-24 | Method for controlling automatic flocculant addition |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351338B (en) * | 2011-06-09 | 2013-06-26 | 威海正大水务设备科技有限公司 | Advanced treating system for drinking tap water and water quality treating method |
| CN102491471B (en) * | 2011-11-14 | 2014-12-03 | 黑龙江绿水悠环保科技有限公司 | Water-purifying process and device for high-efficiency flocculating agent |
| CN102736588B (en) * | 2012-05-25 | 2014-10-22 | 北京天地云箱科技有限公司 | Monitoring method and system |
| CN102976468A (en) * | 2012-12-07 | 2013-03-20 | 上海应用技术学院 | Automatic chemical adding machine in water treatment and applications thereof |
| CN106227251B (en) * | 2016-08-30 | 2019-05-28 | 河南华东工控技术有限公司 | Intelligent dosing system |
| CN106809988A (en) * | 2017-01-03 | 2017-06-09 | 沈阳建筑大学 | A kind of low temperature filtering cloth filtering pool filter water tiny flocculation body quickly forms control method |
| CN106800319A (en) * | 2017-02-08 | 2017-06-06 | 苏州森荣环保处置有限公司 | Automatic medicament feeding system and its adding method thereof |
| CN108793351A (en) * | 2017-04-26 | 2018-11-13 | 北京济安金信科技有限公司 | Sewage water treatment method, system and the electronic equipment with the system |
| CN107055732A (en) * | 2017-05-17 | 2017-08-18 | 北京易沃特科技有限公司 | A kind of heavy metals minimizing technology and device |
| CN107522272A (en) * | 2017-08-23 | 2017-12-29 | 沈阳建筑大学 | Promote the mixed flocculation agent and its application method of aerobic particle mud |
| CN107540069A (en) * | 2017-10-23 | 2018-01-05 | 河海大学 | A kind of full-automatic coagulant dosage system |
| CN108658287A (en) * | 2018-04-25 | 2018-10-16 | 江苏大学 | A kind of Sewage advanced treatment control system and control method |
| CN113264327A (en) * | 2021-05-20 | 2021-08-17 | 太原钢铁(集团)有限公司 | Medicament feeding device and method |
| CN114275866A (en) * | 2021-12-21 | 2022-04-05 | 河南和方科技有限公司 | Intelligent dosing flocculation precipitation system |
| CN114545985B (en) * | 2022-04-21 | 2022-09-02 | 神美科技有限公司 | Floc characteristic monitoring and process feedback-based dosing system and method |
| CN114940533B (en) * | 2022-06-20 | 2023-03-31 | 中建三局绿色产业投资有限公司 | Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system |
| CN116589064B (en) * | 2023-07-18 | 2024-01-26 | 威海华友节能科技有限公司 | Dosing device and dosing method for sewage treatment |
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| CN1049640C (en) * | 1994-02-23 | 2000-02-23 | 机械电子工业部机械工业环境保护技术研究所 | Auto-controlling system for dewatering sludge |
| JP2001137835A (en) * | 1999-11-15 | 2001-05-22 | Yokogawa Electric Corp | Facility control system |
| JP2005332370A (en) * | 2004-04-19 | 2005-12-02 | Toshiba Corp | Control unit |
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2009
- 2009-11-24 CN CN2009102343414A patent/CN101717143B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049640C (en) * | 1994-02-23 | 2000-02-23 | 机械电子工业部机械工业环境保护技术研究所 | Auto-controlling system for dewatering sludge |
| JP2001137835A (en) * | 1999-11-15 | 2001-05-22 | Yokogawa Electric Corp | Facility control system |
| JP2005332370A (en) * | 2004-04-19 | 2005-12-02 | Toshiba Corp | Control unit |
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